/**
 * qq在线服务
 * @returns
 */
function class_qq(){
	var objthis = this;
	var intlasttop = 0;
	this.motion_do = function(){
		var inttop = document.documentElement.scrollTop || document.body.scrollTop;
		var decdiff = (inttop - intlasttop) * 0.1;
		if(decdiff > 0){
			decdiff = Math.ceil(decdiff);
		}else{
			decdiff = Math.floor(decdiff);
		}
		document.getElementById("pub_div_qq").style.top = (parseInt(document.getElementById("pub_div_qq").style.top) + decdiff) + "px";
		intlasttop = intlasttop + decdiff;
		setTimeout(function(){objthis.motion_do();}, 10);
	};
}